/usr/include/corosync/votequorum.h is in libvotequorum-dev 2.4.3-0ubuntu1.
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* Copyright (c) 2009-2012 Red Hat, Inc.
*
* All rights reserved.
*
* Authors: Christine Caulfield (ccaulfie@redhat.com)
* Fabio M. Di Nitto (fdinitto@redhat.com)
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the MontaVista Software, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef COROSYNC_VOTEQUORUM_H_DEFINED
#define COROSYNC_VOTEQUORUM_H_DEFINED
#include <corosync/corotypes.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief votequorum_handle_t
*/
typedef uint64_t votequorum_handle_t;
#define VOTEQUORUM_INFO_TWONODE 1
#define VOTEQUORUM_INFO_QUORATE 2
#define VOTEQUORUM_INFO_WAIT_FOR_ALL 4
#define VOTEQUORUM_INFO_LAST_MAN_STANDING 8
#define VOTEQUORUM_INFO_AUTO_TIE_BREAKER 16
#define VOTEQUORUM_INFO_ALLOW_DOWNSCALE 32
#define VOTEQUORUM_INFO_QDEVICE_REGISTERED 64
#define VOTEQUORUM_INFO_QDEVICE_ALIVE 128
#define VOTEQUORUM_INFO_QDEVICE_CAST_VOTE 256
#define VOTEQUORUM_INFO_QDEVICE_MASTER_WINS 512
#define VOTEQUORUM_QDEVICE_NODEID 0
#define VOTEQUORUM_QDEVICE_MAX_NAME_LEN 255
#define VOTEQUORUM_QDEVICE_DEFAULT_TIMEOUT 10000
#define VOTEQUORUM_QDEVICE_DEFAULT_SYNC_TIMEOUT 30000
#define VOTEQUORUM_NODESTATE_MEMBER 1
#define VOTEQUORUM_NODESTATE_DEAD 2
#define VOTEQUORUM_NODESTATE_LEAVING 3
/** @} */
/**
* @brief The votequorum_info struct
*/
struct votequorum_info {
unsigned int node_id;
unsigned int node_state;
unsigned int node_votes;
unsigned int node_expected_votes;
unsigned int highest_expected;
unsigned int total_votes;
unsigned int quorum;
unsigned int flags;
unsigned int qdevice_votes;
char qdevice_name[VOTEQUORUM_QDEVICE_MAX_NAME_LEN];
};
/**
* @brief The votequorum_node_t struct
*/
typedef struct {
uint32_t nodeid;
uint32_t state;
} votequorum_node_t;
/**
* @brief The votequorum_ring_id_t struct
*/
typedef struct {
uint32_t nodeid;
uint64_t seq;
} votequorum_ring_id_t;
/**
* @brief The votequorum_quorum_notification_fn_t callback
*/
typedef void (*votequorum_quorum_notification_fn_t) (
votequorum_handle_t handle,
uint64_t context,
uint32_t quorate,
uint32_t node_list_entries,
votequorum_node_t node_list[]);
typedef void (*votequorum_nodelist_notification_fn_t) (
votequorum_handle_t handle,
uint64_t context,
votequorum_ring_id_t ring_id,
uint32_t node_list_entries,
uint32_t node_list[]);
/**
* @brief The votequorum_expectedvotes_notification_fn_t callback
*/
typedef void (*votequorum_expectedvotes_notification_fn_t) (
votequorum_handle_t handle,
uint64_t context,
uint32_t expected_votes);
/**
* @brief The votequorum_callbacks_t struct
*/
typedef struct {
votequorum_quorum_notification_fn_t votequorum_quorum_notify_fn;
votequorum_expectedvotes_notification_fn_t votequorum_expectedvotes_notify_fn;
votequorum_nodelist_notification_fn_t votequorum_nodelist_notify_fn;
} votequorum_callbacks_t;
/**
* @brief Create a new quorum connection
* @param handle
* @param callbacks
* @return
*/
cs_error_t votequorum_initialize (
votequorum_handle_t *handle,
votequorum_callbacks_t *callbacks);
/**
* @brief Close the quorum handle
* @param handle
* @return
*/
cs_error_t votequorum_finalize (
votequorum_handle_t handle);
/**
* @brief Dispatch messages and configuration changes
* @param handle
* @param dispatch_types
* @return
*/
cs_error_t votequorum_dispatch (
votequorum_handle_t handle,
cs_dispatch_flags_t dispatch_types);
/**
* @brief Get a file descriptor on which to poll.
*
* @note votequorum_handle_t is NOT a file descriptor and may not be used directly.
*
* @param handle
* @param fd
* @return
*/
cs_error_t votequorum_fd_get (
votequorum_handle_t handle,
int *fd);
/**
* @brief Get quorum information.
* @param handle
* @param nodeid
* @param info
* @return
*/
cs_error_t votequorum_getinfo (
votequorum_handle_t handle,
unsigned int nodeid,
struct votequorum_info *info);
/**
* @brief set expected_votes
* @param handle
* @param expected_votes
* @return
*/
cs_error_t votequorum_setexpected (
votequorum_handle_t handle,
unsigned int expected_votes);
/**
* @brief set votes for a node
* @param handle
* @param nodeid
* @param votes
* @return
*/
cs_error_t votequorum_setvotes (
votequorum_handle_t handle,
unsigned int nodeid,
unsigned int votes);
/**
* @brief Track node and quorum changes
* @param handle
* @param context
* @param flags
* @return
*/
cs_error_t votequorum_trackstart (
votequorum_handle_t handle,
uint64_t context,
unsigned int flags);
/**
* @brief votequorum_trackstop
* @param handle
* @return
*/
cs_error_t votequorum_trackstop (
votequorum_handle_t handle);
/**
* @brief Save and retrieve private data/context
* @param handle
* @param context
* @return
*/
cs_error_t votequorum_context_get (
votequorum_handle_t handle,
void **context);
/**
* @brief votequorum_context_set
* @param handle
* @param context
* @return
*/
cs_error_t votequorum_context_set (
votequorum_handle_t handle,
void *context);
/**
* @brief Register a quorum device
*
* it will be DEAD until polled
*
* @param handle
* @param name
* @return
*/
cs_error_t votequorum_qdevice_register (
votequorum_handle_t handle,
const char *name);
/**
* @brief Unregister a quorum device
* @param handle
* @param name
* @return
*/
cs_error_t votequorum_qdevice_unregister (
votequorum_handle_t handle,
const char *name);
/**
* @brief Update registered name of a quorum device
* @param handle
* @param oldname
* @param newname
* @return
*/
cs_error_t votequorum_qdevice_update (
votequorum_handle_t handle,
const char *oldname,
const char *newname);
/**
* @brief Poll a quorum device
* @param handle
* @param name
* @param cast_vote
* @param ring_id
* @return
*/
cs_error_t votequorum_qdevice_poll (
votequorum_handle_t handle,
const char *name,
unsigned int cast_vote,
votequorum_ring_id_t ring_id);
/**
* @brief Allow qdevice to tell votequorum if master_wins can be enabled or not
* @param handle
* @param name
* @param allow
* @return
*/
cs_error_t votequorum_qdevice_master_wins (
votequorum_handle_t handle,
const char *name,
unsigned int allow);
#ifdef __cplusplus
}
#endif
#endif /* COROSYNC_VOTEQUORUM_H_DEFINED */
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